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thin: fix low_water_mark threshold calc
Reporter noticed lvm2 incorrectly translated
lvm2 threshold value to water mark in commit:
99237f0908
Fix it by properly translating size to number of
blocks in thin-pool and then calc for free blocks
matching configured lvm2 threshold value.
Reported-by: Ming-Hung Tsai <mingnus@gmail.com>
This commit is contained in:
parent
8423be80ee
commit
02f2916b5b
@ -1,5 +1,6 @@
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Version 2.02.142 -
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====================================
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Fix thinp watermark calc for data LV for faster dmeventd responce (2.02.133).
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Use use_blkid_wiping=0 if not defined in lvm.conf and support not compiled in.
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Do not check for suspended devices if scanning for lvmetad update.
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Fix part. table filter with external_device_info_source="udev" and blkid<2.20.
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@ -295,9 +295,10 @@ static int _thin_pool_add_target_line(struct dev_manager *dm,
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if (threshold < 50)
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threshold = 50;
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if (threshold < 100)
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low_water_mark = (len * threshold + 99) / 100;
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/* Translate to number of free pool blocks to trigger watermark */
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low_water_mark = len / seg->chunk_size * (100 - threshold) / 100;
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else
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low_water_mark = len;
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low_water_mark = 0;
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if (!dm_tree_node_add_thin_pool_target(node, len,
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seg->transaction_id,
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